Over time, everything changes. Climates change, species evolve, ecological systems change, and so forth, and a species that was well adapted to a particular ecological niche may eventually find that its niche disappears or changes to the point at which that species is no longer adapted to it.
No evidence of the extinct lifeforms appears in the stratigraphic record immediately following the extinction event.
About 65.5 million years ago. The Cretaceous and Tertiary are geological time periods either side of this event. The event is significant because there was a large mass extinction event at this time including the extinction of all non avian dinosaurs. Most experts agree that the cause of the extinction was a asteroid impact.
Extinction happens when an endangered species is completely wiped out by human activity or natural disaster for example:- the Ice Age when the mammoths and the other animals which went extinct at the same time
What processes must occur to produce an igneous rock
Oxygen gas must be present for a combustion reaction to occur.
Extinction of a single species can occur at any time if said species in hunted excessively, but mass extinction only occurs every 27 to 33 million years.
extinction
Most extinctions occur as background extinctions because they are longer time periods unlike the shorter mass extinctions which there were only two in the Paleozoic era, the Ordovician mass extinction, and the Permian/Triassic extinction in which 95% of all marine animals became extinct
2084 Source: Ayreon
butterfly are not close to extinction they must be in hot climate to live if not they will die
No evidence of the extinct lifeforms appears in the stratigraphic record immediately following the extinction event.
About 65.5 million years ago. The Cretaceous and Tertiary are geological time periods either side of this event. The event is significant because there was a large mass extinction event at this time including the extinction of all non avian dinosaurs. Most experts agree that the cause of the extinction was a asteroid impact.
A background extinction is the continuous extinction of individual species caused by climate change, disease, loss of habitat, and competitive disadvantages against other species. Background extinctions occur at a slow rate over time, affecting only a few species at one time.
Mass extinction could occur due to climate change, an asteroid impact and even a volcanic eruption.
65 million years ago
Extinction is likely.
Some or several species become extinct every day.